Here is my first crack at using a 240vac element with this controller. I am making a lot of assumptions here. Not all PIDS
are the same. They have many different configurations, ratings, pin numbers and functions. This drawing assumes you
are using the EXACT PID at the beginning of this post. I used the same wire colors as in the original drawing.
The "large breaker" value must be determined by your element wattage. Just divide your wattage by 240 to get the element current. example 1500w / 240= 6.25amps use a 8-10amp breaker in this instance.
The SSR MUST be rated to handle a 240VAC circuit. 380VAC is a common one to use. The element "on" indicator was
a bit tricky, I did not want to add to much more circuitry / complexity. The "R" value is determined my the voltage output by
the SSR drive. Measure the volts between PID pins 7&8 with no connections on them. Take this voltage and
divide it by .005, this will give you the R value in ohms. The value you choose does not have to be exact, just close.
Higher ohms= dimmer , lower ohms=brighter. 1/4 or 1/2 watt rating on the resistor is fine.
This is for use of a straight, standard LED, if is doesn't lite, flip it around. LEDs have a polarity, (+/-). They won't lite if put
in backwards. Or you can forgo all this resistor stuff and use a light bulb rated for the voltage measured on PID pins 7&8.
If you are not familiar with electricity / electrical hook ups, please find a friend or someone who is experienced to assist you.
This stuff can hurt and kill you if not properly done.
Maybe some of the regular guys can comment / advise on 240 volt hookups. I have never done one. I am familiar with PIDS, power controllers. I was wanting to build a digital thermometer / high temp alarm for my wood fireplace insert. I got to designing a discreet circuit read a lot on thermocouples/ offset reference amps) and found a PID controller with thermocouple for $30 on Ebay. A home-brew one would have been easily $100 plus time / fuss.
<<Edit>> deleted drawing containing error.
Edited by RadioGuy - 10/20/13 at 8:30am